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[MIPS] FP affinity: Coding style cleanups 

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle 2007-07-10 17:33:02 +01:00
parent e7c4782f92
commit d223a86154
3 changed files with 56 additions and 55 deletions
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12
arch/mips/kernel/mips-mt.c
View File

@ -200,12 +200,16 @@ void mips_mt_regdump(unsigned long mvpctl)
settc(tc);
if ((read_tc_c0_tcbind() & TCBIND_CURVPE) == i) {
printk(" VPE %d\n", i);
printk(" VPEControl : %08lx\n", read_vpe_c0_vpecontrol());
printk(" VPEConf0 : %08lx\n", read_vpe_c0_vpeconf0());
printk(" VPEControl : %08lx\n",
read_vpe_c0_vpecontrol());
printk(" VPEConf0 : %08lx\n",
read_vpe_c0_vpeconf0());
printk(" VPE%d.Status : %08lx\n",
i, read_vpe_c0_status());
printk(" VPE%d.EPC : %08lx\n", i, read_vpe_c0_epc());
printk(" VPE%d.Cause : %08lx\n", i, read_vpe_c0_cause());
printk(" VPE%d.EPC : %08lx\n",
i, read_vpe_c0_epc());
printk(" VPE%d.Cause : %08lx\n",
i, read_vpe_c0_cause());
printk(" VPE%d.Config7 : %08lx\n",
i, read_vpe_c0_config7());
break; /* Next VPE */

59
arch/mips/kernel/traps.c
View File

@ -752,6 +752,33 @@ asmlinkage void do_ri(struct pt_regs *regs)
force_sig(SIGILL, current);
}
/*
* MIPS MT processors may have fewer FPU contexts than CPU threads. If we've
* emulated more than some threshold number of instructions, force migration to
* a "CPU" that has FP support.
*/
static void mt_ase_fp_affinity(void)
{
#ifdef CONFIG_MIPS_MT_FPAFF
if (mt_fpemul_threshold > 0 &&
((current->thread.emulated_fp++ > mt_fpemul_threshold))) {
/*
* If there's no FPU present, or if the application has already
* restricted the allowed set to exclude any CPUs with FPUs,
* we'll skip the procedure.
*/
if (cpus_intersects(current->cpus_allowed, mt_fpu_cpumask)) {
cpumask_t tmask;
cpus_and(tmask, current->thread.user_cpus_allowed,
mt_fpu_cpumask);
set_cpus_allowed(current, tmask);
current->thread.mflags |= MF_FPUBOUND;
}
}
#endif /* CONFIG_MIPS_MT_FPAFF */
}
asmlinkage void do_cpu(struct pt_regs *regs)
{
unsigned int cpid;
@ -785,36 +812,8 @@ asmlinkage void do_cpu(struct pt_regs *regs)
&current->thread.fpu, 0);
if (sig)
force_sig(sig, current);
#ifdef CONFIG_MIPS_MT_FPAFF
else {
/*
* MIPS MT processors may have fewer FPU contexts
* than CPU threads. If we've emulated more than
* some threshold number of instructions, force
* migration to a "CPU" that has FP support.
*/
if(mt_fpemul_threshold > 0
&& ((current->thread.emulated_fp++
> mt_fpemul_threshold))) {
/*
* If there's no FPU present, or if the
* application has already restricted
* the allowed set to exclude any CPUs
* with FPUs, we'll skip the procedure.
*/
if (cpus_intersects(current->cpus_allowed,
mt_fpu_cpumask)) {
cpumask_t tmask;
cpus_and(tmask,
current->thread.user_cpus_allowed,
mt_fpu_cpumask);
set_cpus_allowed(current, tmask);
current->thread.mflags |= MF_FPUBOUND;
}
}
}
#endif /* CONFIG_MIPS_MT_FPAFF */
else
mt_ase_fp_affinity();
}
return;

12
include/asm-mips/system.h
View File

@ -44,7 +44,7 @@ struct task_struct;
* different thread.
*/
#define switch_to(prev,next,last) \
#define __mips_mt_fpaff_switch_to(prev) \
do { \
if (cpu_has_fpu && \
(prev->thread.mflags & MF_FPUBOUND) && \
@ -52,24 +52,22 @@ do { \
prev->thread.mflags &= ~MF_FPUBOUND; \
prev->cpus_allowed = prev->thread.user_cpus_allowed; \
} \
if (cpu_has_dsp) \
__save_dsp(prev); \
next->thread.emulated_fp = 0; \
(last) = resume(prev, next, task_thread_info(next)); \
if (cpu_has_dsp) \
__restore_dsp(current); \
} while(0)
#else
#define __mips_mt_fpaff_switch_to(prev) do { (prev); } while (0)
#endif
#define switch_to(prev,next,last) \
do { \
__mips_mt_fpaff_switch_to(prev); \
if (cpu_has_dsp) \
__save_dsp(prev); \
(last) = resume(prev, next, task_thread_info(next)); \
if (cpu_has_dsp) \
__restore_dsp(current); \
} while(0)
#endif
/*
* On SMP systems, when the scheduler does migration-cost autodetection,